Can you put a stock turbo on a 3.2 NA?

[Por_sha911]

A friend of mine is working on an idea that he can put a stock turbo on a 3.2 with a G50. I asked why not just get a real Turbo? He wants the G50 and some cheap horsepower. I'm fairly sure there are reasons to not do this. Compression would be 1 point different so if you ran the turbo at the lowest setting would that be a problem? How about stock rod bolts getting extra stress? Any other thoughts?

[NathanR]

I've read lots of posts on the turbo forum about this, check em out. From what I've read, it is possible as long as boost is kept low. A lot of bits and pieces are necessary. This may be cheap compared to an engine swap, but it isn't really cheap.

cheers,
Nathan

[JV911SYDNEY]

yes there are a number of guys with 3.2 turbos. they are rather nice to drive...no lag, good power

check out these threads in the turbo forum:

Dyno Plots of turboed 3.2L Wanted

Low boost turbo on a stock 3.2 Carrera

[RarlyL8]

Not only can you turbocharge a Carrera engine but it should be mandatory that you do so. No one should have to live with terminal turbo lag.

All kidding asside, this has been sucessfully done a gazillion times. Places like Protomotive make a living off of those conversions. Motronic injection lends itself very nicely to turbocharging and the Carrera injection is often used on 930s.

[Wil Ferch]

Besides...rod bolts are the same on 3.3 vs 3.2 ......same issues....stock turbos' don't spool up past 5500 rpm ( meaning, for extra power) so high rpm rod bolt stress isn't an issue.

[richde]

Bit of a waste to use that big of a turbo for a low boost application.

Depends on the power goals are, but something that spools as quickly as possible while staying inside the compressor's efficiency range is what you want. People are probably all over that in the turbocharging forum.

My WRX is turbocharged, while it's amazing on boost, ~265hp at the crank, I prefer N/A power. They're very different experiences, turbocharged and N/A, make sure you don't regret your decision. I won't be buying another turbocharged vehicle.

[88911coupe]

What are the most stressed items on a n/a car specifically related to having been turbo'd? Put another way, what's most likely to break under the new stress and strain of the additional power? Will the stock Motronic know what to do?

[rattlsnak]

Originally Posted by richde

My WRX is turbocharged, while it's amazing on boost, ~265hp at the crank, I prefer N/A power. They're very different experiences, turbocharged and N/A, make sure you don't regret your decision. I won't be buying another turbocharged vehicle.

Thats interesting. I'm not sure I've heard of anyone who's had a turbo wanting to go back to N/A.

I vote the other way. I had some hot rod 911s and nothing has yet compared to the C2T I had. I will be getting another one.

[RarlyL8]

That's because it is only ~265HP at the crank, more feeble than most N/A engines. Pump it up to 400HP at the crank and see if that doesn't change your mind...

[ChrisBennet]

The 911 and the 911 Turbo have completely different engine management systems. If your friend is thinking that "Hey, someone gave me their old 930 turbocharger, I should bolt it on my 911." he should be aware that there is a lot more involved than taking the intake system from a 930 and bolting it to a 911.
-Chris

[ChkbookMechanic]

Like others have said, it can be done, just your friend will have to more than likely get a new engine management system to handle the extra variables brought on by the turbo since boost control is now an issue (not that you can't muck around with the stock ECU..).

Like richde, I had a modded WRX and it was a blast, but it is an entirely different beast when it comes to power delivery of the engine. You'll be moving along decently then it feels like the hand of god pushes you back in your seat when full boost hits.

[mb911]

the most stressed item will be the pistons as they are higher compression then the turbo by at least 2 CR points. Other then that internally the 930 and the 3.2 carreras are very very similar. You will need the following to get your conversion done

BEGI rising rate fuel pressure reg
protomotive ign/fuel mapped chip
turbo
waste gates
bov
header/stock 930 exhaust setup
oil feed line
oil drain setup (bat inc has all the goodies for that)
a custom pressure pipe to the barn door AFM

and thats it. good to go

it will have great power

[Wil Ferch]

I understand the comment on the NA vs Turbo power delivery characteristics.

The "immediacy" of a NA engine, ( vs any kind of turbo lag), is much appreciated, and even more so if we're talking ITB ( individual throttle bodies). This "electric" throttle response, and oftentimes the incredible sounds....are intoxicating. In this respect, turbo's don't compare.

[richde]

Originally Posted by RarlyL8

That's because it is only ~265HP at the crank, more feeble than most N/A engines. Pump it up to 400HP at the crank and see if that doesn't change your mind...

It's also only faster than my 911. Just in a hit it and wait a tick sort of way. When I don't drive the Subaru for a while it takes me by surprise, then disappoints me while I'm driving on the twisty road to work in it's "hold on a second and we'll really get going" way.

I just don't like the lag. It's not as if the small turbo on a WRX has much to begin with, it'll only flow enough air for around 300hp if you optimized absolutely everything in the intake and exhaust system. I just prefer the more linear and immediate response of a N/A engine. The sound of the turbo sucking air through the intake and gradual "whoa" push into the back of the seat is neat, but it's just not as nice as the immediate kick of normal aspiration.

Different strokes for different folks.

BTW, it was dyno tuned, that wasn't a buttdyno estimation.

[mb911]

Originally Posted by richde

It's also only faster than my 911. Just in a hit it and wait a tick sort of way. When I don't drive the Subaru for a while it takes me by surprise, then disappoints me while I'm driving on the twisty road to work in it's "hold on a second and we'll really get going" way.

I just don't like the lag. It's not as if the small turbo on a WRX has much to begin with, it'll only flow enough air for around 300hp if you optimized absolutely everything in the intake and exhaust system. I just prefer the more linear and immediate response of a N/A engine. The sound of the turbo sucking air through the intake and gradual "whoa" push into the back of the seat is neat, but it's just not as nice as the immediate kick of normal aspiration.

Different strokes for different folks.

BTW, it was dyno tuned, that wasn't a buttdyno estimation.

I hear what your saying but there is NO way I would go back to NA after having boost. only maybe in a rs clone or a wild 914-6